Thanks for all of the replies. As for the house I lived in, I DID disclose that I used to live in the home, but I DID NOT disclose that I knew about past insect infestation or abundance of cats. I DID inspect the house with this knowledge and found no evidence of these problems. As for knowing the seller, I DID disclose to the buyers agent (again, another friend) that I knew the seller, who later informed the buyer. In each case, both clients were happy with the work I did, and I feel as if my own ethical standards guided me to work for the client, and no one else.

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John Thompson
Shelterworks Home Inspections
Missoula, MT